Bimodular femoral prostheses for total hip arthroplasty allow for high intraoperative customization by offering greater flexibility in restoring the patient's anatomy, allowing the surgeon to adjust parameters such as offset, anteversion, and neck length. Unlike monoblock models, these types of prostheses feature an additional interface between the head and the stem, consisting of an interchangeable neck that mechanically couples to the prosthetic body via a tapered junction. The addition of this mechanical interface introduced structural criticalities that led to extremely high and early failure rates. The onset of excessive micromovements and fretting wear has caused fatigue failure and neck fractures, with critical cases recording a failure rate of up to 86% just four years after implantation.